Harvard’s first massive open online courses, or MOOCs—a new type of college class based on Internet lecture videos. A MOOC is “massive” because it’s designed to enroll tens of thousands of students. It’s “open” because, in theory, anybody with an Internet connection can sign up. “Online” refers not just to the delivery mode but to the style of communication: much, if not all, of it is on the Web. And “course,” of course, means that assessment is involved—assignments, tests, an ultimate credential. When you take MOOCs, you’re expected to keep pace. Your work gets regular evaluation. In the end, you’ll pass or fail or, like the vast majority of enrollees, just stop showing up.